package com.springbootstudy.demo.config;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 登陆检查，
 */
public class LoginHandlerInterceptor implements HandlerInterceptor {
    //目标方法执行之前
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
                             Object handler) throws Exception {
        Object user = request.getSession().getAttribute("loginUser");
        String requestURI = request.getServletPath();
        System.out.println("getServletPath"+requestURI);
        if (user == null) {
           //未登陆，返回登陆页面
            request.setAttribute("msg", "没有权限请先登陆");
            System.out.println("没有权限请先登陆");
//            request.getRequestDispatcher("login.html").forward(request, response);

            return false;
        } else {
//           //已登陆，放行请求
        String servletPath = request.getServletPath();
        System.out.println("servletPath"+servletPath);
        return true;
       }
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object
            handler, ModelAndView modelAndView) throws Exception {
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response,
                                Object handler, Exception ex) throws Exception {
    }
}

